The thermoluminescence (TL) technique has been widely used in various academic fields, but has not yet been involved in the determination of the volcanic cycle (stage) and the judgment of the type of volcanic rocks. Based on studying the TL features of all the volcanic rock samples from the boreholes Shengshen 7 and Yangcan 1, Xujiaweizi,Daqing City, as well as some samples from other boreholes, the authors have reached the following conclusions: (1) In the borehole Shengshen 7, the TL peak-types and total TL integral intensities of the rocks are similar to each other at the top, probably suggesting that the volcanic rocks are eruptive materials of the corresponding period; the TL parameters of the rocks vary rhythmically in the middle and at the bottom, and this may be the result of thermal alteration of the rocks at the top of each eruption by later eruptive materials which consumed part of the cumulated radiation. (2) In the borehole Yangcan 1, the volcanic cycles (stages) can be divided into two subcycles and four stages based on the TL feature variations. At the bottom of the cycle, the rocks show double TL peaks, and the intensities of the main TL peaks show remarkable differences, proba-bly indicating that the bottom rocks are multisource ejected prod-ucts from different volcanic structures, and the products of the small cycles are superimposed upon each other; the intensity of the dominant TL peak decreases upward,reflecting the declining of the eruptive activity of the volcanics. The rocks at the top cycle show a single peak, and the TL intensities only show insignificant differences, implying that the rocks belong to a suite of cognate products. (3) In the borehole Shengshen 7, the TL features of the andesites without obvious alteration are similar to each other; and in the borehole Yangcan 1, the TL features of the tuffaceous rocks with homogeneous lithofacies and without alteration are very similar too. These phenomena show that the utilization of the TL technique to distinguish rocks of pyroclastic fallout facies and determine lithology of lava is feasible.